Even includes a overclocking tool and has dual boot on the card so you can boot as a nook or android. The nook doesn't have a dual core CPU but it is not a slouch either it is the same CPU use in the Motorola Droid and does 925 +

Then I'm trying to understand, how come they can't just host the files needed and place on an existing micro SD?

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That not what they did at all. This is a highly modded version of Gingerbread with a fast SD card that is partioned 4 times and is programed to dual boot. This is not just a generic version it modded all over the place for the Nook. It has touch screen mods and driver mods in addition to what I have mentioned. Remember the best the Nook has is a very limited version of Froyo.

Google it and read the reviews. They took the open source Gingerbread and modded it to run from a high speed SD card and modded the program to work right with the Nook. They added all kinds of tweaks, added the market and a bunch of other custom options just for the Nook. Basically they developed a custom os for the Nook using open source Gingerbread. They did what Barnes and Nobles should have done. They also add present and future support.

Samsung now has 2 different AMOLED displays for their high-end phones. Super AMOLED and Super AMOLED Plus. The former is a pentile display, with 8 sub-pixels per pixel group, while the latter has 12 per. This puts a 720P Pentile display on par with the iPhone Retina display's number of sub-pixels.

Advantages of pentile are that it's brighter, more vivid, and consumes less power. The disadvantage is the visible sub-pixels and what some call "untrue" resolution.

Samsung now has 2 different AMOLED displays for their high-end phones. Super AMOLED and Super AMOLED Plus. The former is a pentile display, with 8 sub-pixels per pixel group, while the latter has 12 per. This puts a 720P Pentile display on par with the iPhone Retina display's number of sub-pixels.

Advantages of pentile are that it's brighter, more vivid, and consumes less power. The disadvantage is the visible sub-pixels and what some call "untrue" resolution.